from flask import abort, jsonify
from flask import current_app
from flask import g
from flask import render_template
from flask import request
from flask import session
from info import constants, db
from info.models import News, Category, User, Comment, CommentLike
from info.modules.news import news_blu
from info.utils.captcha.common import user_login_data
from info.utils.response_code import RET

@news_blu.route('/comment_like', methods=["POST"])
@user_login_data
def comment_like():
    """
    评论点赞
    :return:
    """
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")
    # 获取参数

    comment_id = request.json.get("comment_id")
    news_id = request.json.get("news_id")
    action = request.json.get("action")
    if not all([news_id, comment_id,action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数不足")
    if action not in ["add","remove"]:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    try:
        comment_id = int(comment_id)
        news_id = int( news_id)
    except Exception as e:
        current_app.logger.errror(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger.errror(e)
        return jsonify(errno=RET.PARAMERR, errmsg="数据查询错误")
    if not comment:
        return jsonify(errno=RET.NODATA, errmsg="评论不存在")
    if action == "add":
        "点赞评论"
        comment_like_model = CommentLike.query.filter_by(comment_id=comment_id, user_id=g.user.id).first()
        if not comment_like_model:
            comment_like_model = CommentLike()
            comment_like_model.comment_id = comment.id
            comment_like_model.user_id = user.id
            db.session.add(comment_like_model)
        # 增加点赞条数
        # comment.like_count += 1
    else:
        "取消点赞评论"
        comment_like_model = CommentLike.query.filter(CommentLike.comment_id==comment.id, CommentLike.user_id==user.id).first()
        if comment_like_model:
            db.session.delete(comment_like_model)
            # # 减小点赞条数
            # comment.like_count -= 1
    try:
        db.session.commit()
    except Exception as e:
        db.session.rollback()
        current_app.logger.error()
        return jsonify(errno=RET.DBERR, errmsg="数据库操作失败")

    return jsonify(errno=RET.OK,errmsg="OK")


@news_blu.route('/news_comment', methods=["POST"])
@user_login_data
def comment_news():
    """添加评论"""

    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")
    # 获取参数
    data_dict = request.json
    news_id = data_dict.get("news_id")
    comment_content = data_dict.get("comment")
    parent_id = data_dict.get("parent_id")
    # 判断参数
    if not all([news_id, comment_content]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数不足")
    try:
        news_id = int(news_id)
        if parent_id:
            parent_id = int(parent_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="参数错误")

    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="查询数据失败")

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="该新闻不存在")

    # 初始化模型，保存数据
    comment = Comment()
    comment.user_id = user.id
    comment.news_id = news_id
    comment.content = comment_content
    if parent_id:
        comment.parent_id = parent_id

    # 保存到数据库
    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()

    # 返回响应
    return jsonify(errno=RET.OK, errmsg="评论成功", data=comment.to_dict())

@news_blu.route('/news_collect',methods=['POST'])
@user_login_data
def collect_news():
    """
    收藏新闻
    :return:
    """
    # 1.接收参数
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登陆")
    news_id = request.json.get("news_id")
    action = request.json.get("action")
    # 判断参数
    if not all([news_id,action]):
        return jsonify(errno=RET.PARAMERR,errmsg="参数错误")
    if action not in ["collect","cancel_collect"]:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    try:
        news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    # 查询新闻，判断新闻是否存在
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    if not news:
        return jsonify(errno=RET.NODATA,errmsg="未查询到新闻数据")
    # 收藏或者取消收藏
    if action == "cancel_collect":
        # 取消收藏
        if news in user.collection_news:
            user.collection_news.remove(news)
    else:
        if news not in user.collection_news:
            # 添加到用户的新闻收藏列表
            user.collection_news.append(news)

    return jsonify(errno=RET.OK,errmsg="收藏成功")

@news_blu.route('/<int:news_id>')
@user_login_data
def news_detail(news_id):
    """
    新闻详情

    :param news_id:
    :return:
    """
    # 查询用户信息
    user = g.user

    # 右侧的新闻排行逻辑
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)
    news_dict_li = []
    # 遍历对象列表，将对象的字典添加到字典列表中
    for news in news_list:
        news_dict_li.append(news.to_basic_dict())
    # 查询分类数据，通过模板的形式渲染出来
    categories = Category.query.all()
    category_li = []
    for category in categories:
        category_li.append(category.to_dict())

    # 查询新闻数据
    news = None

    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news:
        abort(404)

    # 更新新闻的点击次数
    news.clicks += 1

    # 判断是否收藏该新闻，默认值为 false
    is_collected = False
    # 判断用户是否收藏过该新闻
    if user:
        if news in user.collection_news:
            is_collected = True

    # 去查询评论数据
    comments = []
    try:
        comments = Comment.query.filter(Comment.news_id==news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        current_app.logger.error(e)

    comment_like_ids =[]
    if g.user:
        try:
            # 需求：查询当前用户再当前新闻里面都点赞了那些评论
            # 1.查询当前新闻的所有评论，取到所有评论的id[1,2,3,4,5]
            comment_ids = [comment.id for comment in comments]
            # 2.再查询当前评论中那些评论被当前用户点赞，查询comment_id 再第一步的评论id列表内的所有数据
            comment_likes = CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids),CommentLike.user_id == g.user.id).all()
            # 3.第二部查询出来的是一个ＣommentLike-->[3,5]
            comment_like_ids = [comment_like.comment_id for comment_like in comment_likes]
        except Exception as e:
            current_app.logger.error(e)

    comment_dict_li = []
    for comment in comments:
        comment_dict = comment.to_dict()
        comment_dict["is_like"] = False
        # 判断当前遍历的评论是否被当前登陆用户点赞
        if comment.id in comment_like_ids:
            comment_dict["is_like"] = True
        comment_dict_li.append(comment_dict)

    data = {
        "user": user.to_dict() if user else None,
        "news_dict_li": news_dict_li,
        "news":news.to_dict(),
        "is_collected": is_collected,
        "comments":comment_dict_li
    }
    return render_template('news/detail.html',data=data)